Preparation and characterization of clay-based porous ceramics with boric acid as additive

Kokunešoski, Maja; Šaponjić, Aleksandra; Maksimović, Vesna; Stanković, Miroslav; Pavlović, Marija; Pantić, Jelena; Majstorović, Jelena

doi:10.1016/j.ceramint.2014.06.007

Cited by 10 publications

(16 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In our previous work it was shown that clay as a natural source of SiO 2 , containing small ammount of boric acid, can be used as an additive for the purpose of synthesizing porous silicon dioxide based materials [11].…”

Section: Introductionmentioning

confidence: 99%

Porous ceramic monoliths based on diatomite

Šaponjić

Stanković

Majstorović

et al. 2015

Ceramics International

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Porous ceramic monoliths based on diatomite

Šaponjić

Stanković

Majstorović

et al. 2015

Ceramics International

Self Cite

View full text Add to dashboard Cite

“…Chemical compositions of starting and thermally and chemically treated clays, obtained by inductively coupled plasma (ICP) spectrometry (Spectro-Flame, Spectro-Analytical Instruments), are listed in Tab. I [38].…”

Section: Characterizationsmentioning

confidence: 99%

“…Tab. I Chemical composition (percentage weight: wt%) of the starting and thermally and chemically treated clay materials [38]. Samples containing iron oxide particles were characterized at room temperature by Xray powder diffraction (XRD) by using Philips PW-1050 diffractometer with Ni-filtered Cu-Kα radiation (1.54178 Å).…”

Section: Characterizationsmentioning

confidence: 99%

“…Other elements were detected as well; owing to the fact that iron was precipitated from natural clay (Tab. I) [38] and Cl used in the chemical treatment of clay. This is probably due to the fact that the fine fraction of clay is likely to lag behind in the preparation process, which is confirmed by XRD analysis (Fig.…”

Section: Scanning Electron Microscope and Energy Dispersive Spectromementioning

confidence: 99%

See 1 more Smart Citation

Iron (III) oxide fabrication from natural clay with reference to phase transformation γ- → α-Fe2O3

Šaponjić¹,

Saponjic²,

Nikolić³

et al. 2017

SCI SINTER

View full text Add to dashboard Cite

Amorphous iron (III) oxide was obtained from clay, using ammonium hydroxide as a precipitating agent. Influence of freeze drying under vacuum, as a drying method, on particle size, chemical composition, and crystallinity of obtained iron (III) oxide powder was investigated. After freeze drying, precipitate was annealed in air at 500 o C and 900 o C. X-ray diffraction, particle size analysis, scanning electron microscopy, energy dispersive spectrometry, Fourier transform infrared spectroscopy, thermogravimetric and differential thermal analysis were used to characterize obtained iron (III) oxide powder. All of three powders obtained by freeze drying and annealing, have low crystallinity and particles with irregular layered shape. Narrow particle size distribution was given by an average diameter value of around 50 μm for all observed powders. Iron-bearing materials like α-Fe 2 O 3 and γ-Fe 2 O 3 are obtained. Differential thermal analysis curve of obtained samples showed endothermic reaction at 620 o C which could be ascribed to phase transition from cubic form γ-→ α-Fe 2 O 3. Thermal transformations of iron (III) oxide, obtained from clay as a natural source, is suitable to explore in the framework of materials chemistry, and opens the possibility to synthesize materials based on Fe 2 O 3 with specific magnetic behavior.

show abstract

“…Chemical activation or modification usually provides the strongest affect on the structure and properties of materials due to chemical interactions of a modifying agent and the surface of material [24]. Despite numerous modifying agents exploited in recent decades for altering theproperties of aluminosilicates, the activation by acid and alkaline solutions remains as the mostfrequently used in industrial or laboratory processing of clays [8,25,26].…”

Section: Chemical Modification Of Clay Minerals and Its Influence On mentioning

confidence: 99%

Adsorption of Industrial Pollutants by Natural and Modified Aluminosilicates

Novikova¹,

Belchinskaya²

2016

Clays, Clay Minerals and Ceramic Materials Based on Clay Minerals

View full text Add to dashboard Cite

The adsorption ability of natural clay minerals and zeolites is a structurally caused distinguished feature, which determines their physical-chemical properties and almost each area of application. The type of surface active sites responsible for adsorption behavior differs for various structural types of aluminosilicates and varies under modifying agents. The present chapter illustrates the effect of the acid and base modification of natural aluminosilicates on their adsorption behavior in respect to a number of pollutants present in aqueous media. For this, the change of adsorption-structural characteristics of natural clay samples containing representatives of the main groups of clay minerals under activation is considered. Further, the chapter focuses on characterization of surface active sites by means of a new method of a catalytic conversion of 2-methylbut-3-yn-2-ol. The presence of both acid and basic sites on the aluminosilicates surface as well as variations of surface acidity and basicity for different structural types of aluminosilicates under varying conditions of modification is discussed. The third highlight of the chapter encompasses adsorption processes taking place in aqueous solutions of formaldehyde, acetic acid, and ammonium chloride on the surface of natural and activated aluminosilicates. The activating effect of a number of inorganic acids and bases on adsorption equilibrium is compared. The considered mechanism of the adsorption of electrolytes and polar molecules from aqueous media may comprise hydrogen bonding, chemisorptions, or ion-exchange reactions.

show abstract

Preparation and characterization of clay-based porous ceramics with boric acid as additive

Cited by 10 publications

References 23 publications

Porous ceramic monoliths based on diatomite

Porous ceramic monoliths based on diatomite

Iron (III) oxide fabrication from natural clay with reference to phase transformation γ- → α-Fe2O3

Adsorption of Industrial Pollutants by Natural and Modified Aluminosilicates

Contact Info

Product

Resources

About